New York Consolidated Laws, Civil Practice Law and Rules - CVP § 3130. Use of interrogatories

1. Except as otherwise provided herein, after commencement of an action, any party may serve upon any other party written interrogatories. Except in a matrimonial action, a party may not serve written interrogatories on another party and also demand a bill of particulars of the same party pursuant to section 3041. In the case of an action to recover damages for personal injury, injury to property or wrongful death predicated solely on a cause or causes of action for negligence, a party shall not be permitted to serve interrogatories on and conduct a deposition of the same party pursuant to rule 3107 without leave of court.

2. After the commencement of a matrimonial action or proceeding, upon motion brought by either party, upon such notice to the other party and to the non-party from whom financial disclosure is sought, and given in such manner as the court shall direct, the court may order a non-party to respond under oath to written interrogatories limited to furnishing financial information concerning a party, and further provided such information is both reasonable and necessary in the prosecution or the defense of such matrimonial action or proceeding.